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The Antenna Complex

The Antenna Complex

Plants and other photosynthetic organisms comprise pigments capable of absorption of direct sunlight. These pigments are present in the reaction center - the main site of photochemical reactions as well as in the antenna complex. Under average light conditions, the rate at which reaction center pigments absorb light is far below the electron transport chain's capacity. As a result, the reaction center alone cannot provide enough energy to drive photosynthesis. The photosynthetic efficiency can...

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Solar Transparent Radiators by Optical Nanoantennas.

Gustav Jönsson¹, Daniel Tordera², Tavakol Pakizeh³

¹Department of Physics, Chalmers University of Technology , 41296 Gothenburg, Sweden.

|October 10, 2017

Summary

This summary is machine-generated.

New solar thermal surfaces with nanoplasmonic antennas can warm window surfaces by 8 K during cold weather. This technology improves thermal comfort and reduces energy loss through architectural windows.

Keywords:

Thermoplasmonics optical antennas plasmonic heating plasmonic nanostructures thermal management

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Area of Science:

Materials Science
Nanotechnology
Optics

Background:

Architectural windows contribute to thermal discomfort by being colder than indoor air on cold days.
Increasing indoor temperature to compensate for window heat loss leads to significant energy waste.

Purpose of the Study:

To develop novel solar thermal surfaces for architectural windows.
To enhance indoor thermal comfort and reduce energy losses.

Main Methods:

Fabrication of complex nanoplasmonic antennas.
Integration of nanoantennas onto window surfaces.
Measurement of temperature changes and light transmission properties under solar irradiation.

Main Results:

The nanoplasmonic surfaces raised window glazing temperature by up to 8 K under solar irradiation.
The surfaces maintained a high color rendering index (98.76) for transmitted light.
The nanoantennas demonstrated directional absorption and tunable spectral ranges.

Conclusions:

Solar thermal surfaces based on nanoplasmonic antennas offer a promising solution for improving thermal comfort in buildings.
The technology's substrate independence and tunable properties allow for broad application on various surfaces.